1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 // Original code is licensed as follows:
7 /*
8 * Copyright 2007 ZXing authors
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 */
22
23 #include "xfa/src/fxbarcode/barcode.h"
24 #include "BC_QRCoderErrorCorrectionLevel.h"
25 #include "BC_QRCoderFormatInformation.h"
26 const int32_t CBC_QRCoderFormatInformation::FORMAT_INFO_MASK_QR = 0X5412;
27 const int32_t CBC_QRCoderFormatInformation::FORMAT_INFO_DECODE_LOOKUP[32][2] = {
28 {0x5412, 0x00}, {0x5125, 0x01}, {0x5E7C, 0x02}, {0x5B4B, 0x03},
29 {0x45F9, 0x04}, {0x40CE, 0x05}, {0x4F97, 0x06}, {0x4AA0, 0x07},
30 {0x77C4, 0x08}, {0x72F3, 0x09}, {0x7DAA, 0x0A}, {0x789D, 0x0B},
31 {0x662F, 0x0C}, {0x6318, 0x0D}, {0x6C41, 0x0E}, {0x6976, 0x0F},
32 {0x1689, 0x10}, {0x13BE, 0x11}, {0x1CE7, 0x12}, {0x19D0, 0x13},
33 {0x0762, 0x14}, {0x0255, 0x15}, {0x0D0C, 0x16}, {0x083B, 0x17},
34 {0x355F, 0x18}, {0x3068, 0x19}, {0x3F31, 0x1A}, {0x3A06, 0x1B},
35 {0x24B4, 0x1C}, {0x2183, 0x1D}, {0x2EDA, 0x1E}, {0x2BED, 0x1F},
36 };
37 const int32_t CBC_QRCoderFormatInformation::BITS_SET_IN_HALF_BYTE[] = {
38 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
CBC_QRCoderFormatInformation(int32_t formatInfo)39 CBC_QRCoderFormatInformation::CBC_QRCoderFormatInformation(int32_t formatInfo) {
40 m_errorCorrectLevl =
41 CBC_QRCoderErrorCorrectionLevel::ForBits((formatInfo >> 3) & 0x03);
42 m_dataMask = (uint8_t)(formatInfo & 0x07);
43 }
~CBC_QRCoderFormatInformation()44 CBC_QRCoderFormatInformation::~CBC_QRCoderFormatInformation() {}
NumBitsDiffering(int32_t a,int32_t b)45 int32_t CBC_QRCoderFormatInformation::NumBitsDiffering(int32_t a, int32_t b) {
46 a ^= b;
47 return BITS_SET_IN_HALF_BYTE[a & 0x0F] +
48 BITS_SET_IN_HALF_BYTE[(a >> 4) & 0x0F] +
49 BITS_SET_IN_HALF_BYTE[(a >> 8) & 0x0F] +
50 BITS_SET_IN_HALF_BYTE[(a >> 12) & 0x0F] +
51 BITS_SET_IN_HALF_BYTE[(a >> 16) & 0x0F] +
52 BITS_SET_IN_HALF_BYTE[(a >> 20) & 0x0F] +
53 BITS_SET_IN_HALF_BYTE[(a >> 24) & 0x0F] +
54 BITS_SET_IN_HALF_BYTE[(a >> 28) & 0x0F];
55 }
GetDataMask()56 uint8_t CBC_QRCoderFormatInformation::GetDataMask() {
57 return m_dataMask;
58 }
59 CBC_QRCoderErrorCorrectionLevel*
GetErrorCorrectionLevel()60 CBC_QRCoderFormatInformation::GetErrorCorrectionLevel() {
61 return m_errorCorrectLevl;
62 }
63 CBC_QRCoderFormatInformation*
DecodeFormatInformation(int32_t maskedFormatInfo)64 CBC_QRCoderFormatInformation::DecodeFormatInformation(
65 int32_t maskedFormatInfo) {
66 CBC_QRCoderFormatInformation* formatInfo =
67 DoDecodeFormatInformation(maskedFormatInfo);
68 if (formatInfo != NULL) {
69 return formatInfo;
70 }
71 return DoDecodeFormatInformation(maskedFormatInfo ^ FORMAT_INFO_MASK_QR);
72 }
73 CBC_QRCoderFormatInformation*
DoDecodeFormatInformation(int32_t maskedFormatInfo)74 CBC_QRCoderFormatInformation::DoDecodeFormatInformation(
75 int32_t maskedFormatInfo) {
76 int32_t bestDifference = (int32_t)FXSYS_nan();
77 int32_t bestFormatInfo = 0;
78 for (int32_t i = 0; i < 32; i++) {
79 int32_t const* decodeInfo = &FORMAT_INFO_DECODE_LOOKUP[i][0];
80 int32_t targetInfo = decodeInfo[0];
81 if (targetInfo == maskedFormatInfo) {
82 return new CBC_QRCoderFormatInformation(decodeInfo[1]);
83 }
84 int32_t bitsDifference = NumBitsDiffering(maskedFormatInfo, targetInfo);
85 if (bitsDifference < bestDifference) {
86 bestFormatInfo = decodeInfo[1];
87 bestDifference = bitsDifference;
88 }
89 }
90 if (bestDifference <= 3) {
91 return new CBC_QRCoderFormatInformation(bestFormatInfo);
92 }
93 return NULL;
94 }
95